llh 25' 40" r 



ECLIPSE OF THE SUN, JUNE 16, 180fi. 29 J 



With these elements we have the conjunction 



At Kinderhook. Mean time. 



h / h 



For the beginning of the eclipse. . . 11 25 40 9} 



Total obscurity. . . . . 11 25 40 7* 



End of total obscurity. . . . 1125 40 71 



End of the eclipse. . . . .1125405. 



In Albany with the same elements, conjunction in mean time. 

 For the beginning of total obscuritv. . llh 25' 47" 2 



End. . . ditto. . . 11 25 57 



Comparing the beginning of the total obscurity at Kinder- 

 hook with the beginning of the total obscurity at Albany, it 

 results that Albany is east of Kinderhook. , . = 6" 5 



By the chronometer, page 269. . ..—61 



This determination appears to be correctly ascertained, and 

 to prove indubitably, that there was an error of about 10" in 

 the end of total obscurity: it will not be improper to note that 

 the interior contacts are instantaneous, and therefore the half 

 second easily distinguishable. — Therefore the error should be 

 attributed, to taking one decimal for another, the same remark 

 should be made on the Boston observations. 



Indeed, on applying the calculation, it results that the num- 

 ber 3, in place or taking 1 l h 22' 30", made a mistake and 

 took 1 1" 22' 40", so that the duration of total obscuritv No. 

 1, 2, appears to be the most likely to be correct. 



Suppose the longitude of Boston 4 h 53' 28", we have the 

 chronometer slow to mean time 2' 02". 



Duration of total obscurity by observations 1 and 2. . . 4 38 



In Albany. . . . . . 4 41 



In Kinderhook. . . . . . . . 4 37 



In Boston the shortest distance from the centres. . . . 14 7 JC. 



Albany. . . . . .... 6 1 S. 



Kinderhook 9 7 N. 



As the moon at Albany passed to the south of the centre of 

 the sun, and in Kinderhook and Boston to the north of it, by 

 combining the three observations, the result is as follows: 



Correction of the tables in latitude. . . . . . _}. 10" 5 



Irradiation of the S's semidiameter. . . 3 15 



Irradiation of the ©'s semidiameter. . . 1 35 



With the same elements we have the conjunction in Lancaster. 



For the beginning ll' 1 15' 25" 3 mean time. 

 End. . 11 15 31 9 ditto. 



Q 



